sweep the last typographic punctuation out of the components and data files
build-and-deploy / build (push) Failing after 14m21s
build-and-deploy / build (push) Failing after 14m21s
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@@ -1,9 +1,9 @@
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---
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title: "Global Infrastructure Modernisation"
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outcome: "Modernised a global, multi-region estate at scale — ~1,000 VMs, flat-to-segmented networks, and a migration to Azure and Microsoft 365 — on a live 24/7 business."
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outcome: "Modernised a global, multi-region estate at scale - ~1,000 VMs, flat-to-segmented networks, and a migration to Azure and Microsoft 365 - on a live 24/7 business."
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summary: "Across global IT roles at Virtus Health and Linde Asia Pacific: a ~1,000-VM VMware estate managed centrally, a flat-to-segmented network redesign with SD-WAN and Aruba ClearPass, Palo Alto / FortiGate firewall redesigns, and migration to Azure (Blob, AVS) and Microsoft 365."
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role: "Infrastructure Engineer · Virtus Health & Linde Asia Pacific"
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period: "2019 – 2025"
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period: "2019 - 2025"
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stack: ["VMware / vSphere", "Azure (Blob, AVS)", "Microsoft 365", "SD-WAN", "Aruba ClearPass", "Palo Alto / FortiGate", "Veeam"]
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featured: false
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order: 40
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@@ -14,13 +14,13 @@ cover: "global-infra-modernisation"
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Enterprise estates accrete. Flat networks, sprawling VM counts, aging firewalls, and
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on-prem-only services become a security and operations drag. The work: modernise a global,
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multi-region business that runs 24/7 — without breaking it.
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multi-region business that runs 24/7 - without breaking it.
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## Constraints
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- **Keep the lights on** — change a live, multi-region estate without downtime.
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- **Security and compliance** — segmentation, patching, and auditability throughout.
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- **Cost-aware** — modernise to cloud where it pays, justified through CapEx/OpEx cases.
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- **Keep the lights on** - change a live, multi-region estate without downtime.
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- **Security and compliance** - segmentation, patching, and auditability throughout.
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- **Cost-aware** - modernise to cloud where it pays, justified through CapEx/OpEx cases.
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## Design
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@@ -28,10 +28,10 @@ Across global roles I ran and improved a **~1,000-VM VMware estate**, managed ce
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the IT team and operated across regions including the UK. I re-segmented **flat sites into
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isolated VLAN ranges** with ACLs, layering in **SD-WAN** and **Aruba ClearPass** with 802.1x
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onboarding for a tiered, authenticated network. **Palo Alto / FortiGate** firewalls were
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upgraded and redesigned around the new segmentation — RCA, staging through FortiManager, and
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upgraded and redesigned around the new segmentation - RCA, staging through FortiManager, and
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a flat-to-segmented redesign.
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On the platform side: workloads and identity moved to **Azure** (Blob storage, AVS — lifting
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On the platform side: workloads and identity moved to **Azure** (Blob storage, AVS - lifting
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existing vSphere environments) and **Microsoft 365**, with a **hybrid AD sync** I architected
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to bridge on-prem and cloud identity. The estate work also covered an **ERP hardware refresh
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with a new DR / mainframe solution**, file shares to Azure Blob over Kerberos auth, **Veeam**
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@@ -39,14 +39,14 @@ backups, and a region-wide **PBX-to-VoIP** migration (RingCentral).
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## Security & reliability decisions
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- **Flat → segmented** — isolation by design, not by exception.
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- **Authenticated access** (ClearPass, 802.1x) — the network knows who's on it.
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- **Patched, current firewalls** — closing the easy doors first.
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- **DR built in** — recovery designed, not assumed.
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- **Flat → segmented** - isolation by design, not by exception.
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- **Authenticated access** (ClearPass, 802.1x) - the network knows who's on it.
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- **Patched, current firewalls** - closing the easy doors first.
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- **DR built in** - recovery designed, not assumed.
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## Outcome
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A more secure, segmented, cloud-leaning estate that's cheaper to run and easier to operate —
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A more secure, segmented, cloud-leaning estate that's cheaper to run and easier to operate -
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delivered against live-business constraints across multiple regions.
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## Future improvements
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